$ git feature myfeature
  switched to branch 'feature/rofl'
$ ...
$ git checkout develop
$ git feature finish myfeature
  merging 'feature/rofl' into develop
  deleted branch 'feature/rofl'

$ git delete-merged-branches
  # hint: do `git remote prune origin` after
$ git create-branch development
$ git delete-branch development
$ git fresh-branch gh-pages

$ git summary         # repo age, commits, active days, etc
$ git info            # shows information about the repo
$ git effort          # commits per file
$ git commits-since   # list commits since date
$ git changelog       # generate changelog since last tag

$ git fork strongloop/express
# sync your fork with the original repository:
$ git remote add upstream https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git
$ git fetch upstream; git merge upstream/master

$ git release v1.0.0           # commit, tag, push-tags
$ git delete-tag v1.0.0

$ git ignore "*.log"   # append *.log to .gitignore
$ git undo             # undo the last local commit

$ git lock config/database.yml
$ git unlock config/database.yml

$ git obliterate secret.yml   # remove all references to it